:root {
  color-scheme: light;
  --ink: #182535;
  --muted: #647488;
  --soft: #8492a3;
  --blue: #315f86;
  --blue-dark: #244967;
  --blue-pale: #eaf1f6;
  --surface: #ffffff;
  --canvas: #f4f7f9;
  --line: #dfe6ec;
  --green: #398263;
  --shadow: 0 28px 70px rgb(34 54 72 / 16%);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--canvas);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body { margin: 0; background: var(--canvas); }
p, h1, h2, h3, figure { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
a:focus-visible { outline: 3px solid #6ea1ca; outline-offset: 5px; }
.shell { width: min(1180px, calc(100% - 64px)); margin-inline: auto; }
.section { padding-block: 112px; }
.skip-link { position: fixed; top: -80px; left: 24px; z-index: 100; padding: 12px 18px; border-radius: 10px; background: var(--ink); color: #fff; }
.skip-link:focus { top: 18px; }

.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgb(210 220 228 / 78%); background: rgb(248 250 252 / 82%); backdrop-filter: blur(22px) saturate(150%); }
.nav-inner { min-height: 74px; display: flex; align-items: center; gap: 34px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 16px; font-weight: 720; letter-spacing: -.015em; margin-right: auto; }
.brand img { width: 38px; height: 38px; border-radius: 10px; box-shadow: 0 5px 14px rgb(23 43 61 / 13%); }
.brand small { margin-left: 5px; color: var(--blue); font-size: 9px; letter-spacing: .12em; text-transform: uppercase; }
nav { display: flex; gap: 30px; }
nav a { color: var(--muted); font-size: 13px; font-weight: 580; transition: color .2s; }
nav a:hover { color: var(--ink); }
.nav-download { min-height: 38px; display: inline-flex; align-items: center; padding: 0 17px; border: 1px solid #cbd7e0; border-radius: 10px; background: rgb(255 255 255 / 75%); color: var(--blue-dark); font-size: 13px; font-weight: 650; transition: transform .2s, box-shadow .2s; }
.nav-download:hover { transform: translateY(-1px); box-shadow: 0 7px 20px rgb(37 68 94 / 10%); }

.hero { position: relative; overflow: hidden; padding: 124px 0 82px; background: linear-gradient(180deg, #f9fbfc 0%, #edf2f6 72%, #e5edf3 100%); }
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .42; background-image: linear-gradient(rgb(62 91 116 / 6%) 1px, transparent 1px), linear-gradient(90deg, rgb(62 91 116 / 6%) 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(to bottom, black, transparent 72%); }
.hero-glow { position: absolute; width: 760px; height: 580px; right: -170px; top: -180px; border-radius: 50%; background: radial-gradient(circle, rgb(121 164 198 / 30%), transparent 68%); filter: blur(12px); }
.hero-copy { position: relative; z-index: 1; max-width: 920px; text-align: center; }
.eyebrow, .section-label { color: var(--blue); font-size: 12px; font-weight: 720; letter-spacing: .13em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; justify-content: center; gap: 9px; }
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 5px rgb(57 130 99 / 10%); }
h1 { margin-top: 25px; font-size: clamp(52px, 7vw, 88px); line-height: 1.08; letter-spacing: -.065em; font-weight: 760; }
h1 em { color: var(--blue); font-style: normal; }
.hero-intro { max-width: 720px; margin: 30px auto 0; color: var(--muted); font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; justify-content: center; gap: 13px; margin-top: 36px; flex-wrap: wrap; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 11px; padding: 0 23px; border: 1px solid transparent; border-radius: 13px; font-size: 14px; font-weight: 680; transition: transform .2s, box-shadow .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--blue); color: #fff; box-shadow: 0 12px 28px rgb(49 95 134 / 24%); }
.button-primary:hover { background: var(--blue-dark); box-shadow: 0 15px 34px rgb(49 95 134 / 30%); }
.button-secondary { border-color: #ccd7e0; background: rgb(255 255 255 / 68%); color: var(--ink); }
.button-secondary:hover { background: #fff; box-shadow: 0 12px 25px rgb(33 53 70 / 9%); }
.release-facts { margin-top: 27px; display: flex; justify-content: center; gap: 0; color: var(--soft); font-size: 12px; }
.release-facts span { display: flex; align-items: center; }
.release-facts span + span::before { content: ""; width: 3px; height: 3px; margin: 0 12px; border-radius: 50%; background: #9ba8b5; }
.hero-stage { position: relative; z-index: 2; margin-top: 76px; perspective: 1400px; }
.window-frame { overflow: hidden; border: 1px solid rgb(156 175 190 / 65%); border-radius: 24px; background: #fff; box-shadow: var(--shadow); }
.window-bar { height: 46px; display: flex; align-items: center; gap: 8px; padding: 0 17px; border-bottom: 1px solid #e2e7eb; background: rgb(250 251 252 / 92%); }
.window-bar i { width: 10px; height: 10px; border-radius: 50%; background: #ff6159; }
.window-bar i:nth-child(2) { background: #ffbd2e; }
.window-bar i:nth-child(3) { background: #28c840; }
.window-bar span { position: absolute; left: 50%; transform: translateX(-50%); color: #4d5b69; font-size: 11px; font-weight: 650; }
.window-frame > img { width: 100%; display: block; }

.principle { background: #fff; }
.principle-grid { display: grid; grid-template-columns: 1fr .8fr; gap: 90px; align-items: end; }
h2 { font-size: clamp(34px, 4.2vw, 54px); line-height: 1.18; letter-spacing: -.047em; font-weight: 730; }
.principle-grid h2 { max-width: 720px; margin-top: 18px; }
.principle-grid > p { color: var(--muted); font-size: 16px; line-height: 1.9; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 70px; overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: var(--line); }
.steps article { min-height: 220px; padding: 32px; background: #fff; }
.steps span { color: var(--blue); font-size: 11px; font-weight: 750; letter-spacing: .12em; }
.steps h3 { margin-top: 45px; font-size: 19px; }
.steps p { margin-top: 10px; color: var(--muted); font-size: 14px; line-height: 1.75; }

.workflow { background: #edf2f6; }
.section-heading { max-width: 780px; text-align: center; margin-bottom: 72px; }
.section-heading h2 { margin-top: 17px; }
.section-heading > p:last-child { margin-top: 18px; color: var(--muted); font-size: 16px; }
.workflow-row { display: grid; grid-template-columns: .76fr 1.55fr; gap: 52px; align-items: center; }
.workflow-row + .workflow-row { margin-top: 116px; }
.workflow-row-reverse { grid-template-columns: 1.55fr .76fr; }
.workflow-row-reverse .workflow-copy { grid-column: 2; grid-row: 1; }
.workflow-row-reverse .product-shot { grid-column: 1; grid-row: 1; }
.route { display: inline-flex; align-items: center; gap: 9px; padding: 7px 10px; border: 1px solid #d2dce5; border-radius: 9px; background: rgb(255 255 255 / 68%); color: var(--muted); font-size: 11px; }
.route b { color: var(--blue-dark); font-weight: 700; }
.route i { font-style: normal; }
.workflow-copy h3 { margin-top: 23px; font-size: clamp(27px, 3vw, 38px); line-height: 1.28; letter-spacing: -.035em; }
.workflow-copy > p { margin-top: 18px; color: var(--muted); font-size: 15px; line-height: 1.85; }
.workflow-copy ul { margin: 25px 0 0; padding: 0; display: grid; gap: 11px; list-style: none; color: #526274; font-size: 13px; }
.workflow-copy li::before { content: "✓"; margin-right: 10px; color: var(--green); font-weight: 780; }
.product-shot { overflow: hidden; border: 1px solid #ced8e1; border-radius: 18px; background: #fff; box-shadow: 0 20px 55px rgb(35 59 78 / 14%); }
.product-shot img { display: block; width: 100%; }

.features { background: #fff; }
.section-heading.compact { max-width: 760px; margin-bottom: 58px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-grid article { min-height: 218px; padding: 28px; border: 1px solid var(--line); border-radius: 17px; background: #fbfcfd; transition: transform .2s, border-color .2s, box-shadow .2s; }
.feature-grid article:hover { transform: translateY(-3px); border-color: #c7d5df; box-shadow: 0 15px 30px rgb(38 60 78 / 8%); }
.feature-grid article > span { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 11px; background: var(--blue-pale); color: var(--blue); font-size: 17px; font-weight: 700; }
.feature-grid h3 { margin-top: 28px; font-size: 17px; }
.feature-grid p { margin-top: 9px; color: var(--muted); font-size: 13px; line-height: 1.75; }

.privacy { padding-top: 0; background: #fff; }
.privacy-panel { display: grid; grid-template-columns: 82px 1.35fr .72fr; gap: 34px; align-items: center; padding: 56px; border-radius: 26px; background: var(--ink); color: #fff; overflow: hidden; position: relative; }
.privacy-panel::after { content: ""; position: absolute; width: 430px; height: 430px; right: -230px; top: -250px; border: 1px solid rgb(119 167 204 / 25%); border-radius: 50%; box-shadow: 0 0 0 65px rgb(119 167 204 / 4%), 0 0 0 130px rgb(119 167 204 / 3%); }
.privacy-mark { width: 68px; height: 68px; display: grid; place-items: center; border: 1px solid rgb(255 255 255 / 14%); border-radius: 20px; background: rgb(255 255 255 / 7%); color: #83c6a7; font-size: 26px; }
.privacy-panel .section-label { color: #88b9de; }
.privacy-panel h2 { margin-top: 12px; font-size: 38px; }
.privacy-panel p { max-width: 650px; margin-top: 16px; color: #b9c7d3; font-size: 14px; line-height: 1.85; }
.privacy-list { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.privacy-list span { padding: 11px 12px; border: 1px solid rgb(255 255 255 / 11%); border-radius: 10px; background: rgb(255 255 255 / 5%); color: #dfe7ed; font-size: 12px; text-align: center; }

.install { background: #edf2f6; }
.install-grid { display: grid; grid-template-columns: .88fr 1.12fr; gap: 100px; align-items: start; }
.install-copy h2 { margin-top: 18px; }
.install-copy > p:not(.section-label) { max-width: 500px; margin-top: 21px; color: var(--muted); font-size: 15px; line-height: 1.8; }
.install-copy .button { margin-top: 30px; }
.text-link { display: block; width: fit-content; margin-top: 18px; color: var(--blue); font-size: 13px; font-weight: 650; }
.text-link:hover { text-decoration: underline; text-underline-offset: 5px; }
.install-steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.install-steps li { display: flex; gap: 18px; padding: 23px; border: 1px solid #d6e0e7; border-radius: 15px; background: rgb(255 255 255 / 72%); }
.install-steps li > span { flex: 0 0 auto; width: 33px; height: 33px; display: grid; place-items: center; border-radius: 10px; background: var(--blue-pale); color: var(--blue); font-size: 12px; font-weight: 750; }
.install-steps h3 { font-size: 15px; }
.install-steps p { margin-top: 6px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.beta-note { display: flex; gap: 18px; margin-top: 42px; padding: 18px 22px; border-left: 3px solid #b98a3c; background: rgb(255 255 255 / 60%); color: #645b4d; font-size: 12px; line-height: 1.7; }
.beta-note strong { flex: 0 0 auto; color: #7b5b27; }

.site-footer { padding: 60px 0 34px; background: #152230; color: #fff; }
.footer-main { display: flex; justify-content: space-between; align-items: center; gap: 40px; padding-bottom: 42px; }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand img { border-radius: 11px; }
.footer-brand strong { display: block; font-size: 17px; }
.footer-brand span { display: block; margin-top: 5px; color: #98aabd; font-size: 12px; }
.footer-links { display: flex; gap: 28px; color: #bdcad5; font-size: 12px; }
.footer-links a:hover { color: #fff; }
.footer-legal { display: flex; justify-content: space-between; gap: 70px; padding-top: 26px; border-top: 1px solid rgb(255 255 255 / 10%); color: #8295a8; font-size: 11px; line-height: 1.75; }
.footer-legal p { max-width: 700px; }
.footer-legal > div { display: flex; flex-direction: column; align-items: flex-end; gap: 5px; white-space: nowrap; }

@media (max-width: 980px) {
  .section { padding-block: 88px; }
  .principle-grid { gap: 48px; }
  .workflow-row, .workflow-row-reverse { grid-template-columns: 1fr; gap: 34px; }
  .workflow-row-reverse .workflow-copy, .workflow-row-reverse .product-shot { grid-column: auto; grid-row: auto; }
  .workflow-row-reverse .workflow-copy { order: 1; }
  .workflow-row-reverse .product-shot { order: 2; }
  .workflow-copy { max-width: 620px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .privacy-panel { grid-template-columns: 70px 1fr; }
  .privacy-list { grid-column: 2; }
  .install-grid { gap: 56px; }
}

@media (max-width: 720px) {
  .shell { width: min(100% - 36px, 1180px); }
  html { scroll-padding-top: 76px; }
  .nav-inner { min-height: 64px; gap: 16px; }
  .brand img { width: 34px; height: 34px; }
  .brand { font-size: 14px; }
  nav { display: none; }
  .nav-download { min-height: 36px; padding-inline: 13px; font-size: 12px; }
  .hero { padding: 88px 0 58px; }
  h1 { font-size: clamp(43px, 13.5vw, 64px); }
  .hero-intro { font-size: 15px; line-height: 1.75; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .release-facts { align-items: center; flex-wrap: wrap; row-gap: 8px; }
  .hero-stage { width: calc(100% - 18px); margin-top: 48px; }
  .window-frame { border-radius: 14px; }
  .window-bar { height: 32px; }
  .window-bar i { width: 7px; height: 7px; }
  .section { padding-block: 68px; }
  h2 { font-size: 34px; }
  .principle-grid { grid-template-columns: 1fr; gap: 24px; }
  .steps { grid-template-columns: 1fr; margin-top: 44px; }
  .steps article { min-height: 0; padding: 25px; }
  .steps h3 { margin-top: 24px; }
  .section-heading { margin-bottom: 48px; text-align: left; }
  .workflow-row + .workflow-row { margin-top: 78px; }
  .product-shot { border-radius: 12px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { min-height: 0; }
  .privacy { padding-top: 0; }
  .privacy-panel { grid-template-columns: 1fr; gap: 22px; padding: 30px 25px; border-radius: 20px; }
  .privacy-mark { width: 52px; height: 52px; border-radius: 15px; }
  .privacy-panel h2 { font-size: 33px; }
  .privacy-list { grid-column: auto; }
  .install-grid { grid-template-columns: 1fr; gap: 46px; }
  .beta-note { display: block; }
  .beta-note p { margin-top: 7px; }
  .footer-main, .footer-legal { display: block; }
  .footer-links { margin-top: 30px; flex-wrap: wrap; gap: 16px 24px; }
  .footer-legal { padding-top: 22px; }
  .footer-legal > div { align-items: flex-start; margin-top: 20px; }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy { animation: enter .7s ease-out both; }
  .hero-stage { animation: enter .85s .12s ease-out both; }
  @keyframes enter { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}